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May 15,2018 <br /> LABS <br /> Jason Lindhal INDUSTRIALHYGIENE <br /> NVL Field Services Division SERVICES <br /> 4708 Aurora Ave. N. Laboratory I Management Training <br /> Seattle,WA 98103 <br /> RE: Bulk Asbestos Fiber Analysis; NVL Batch#1808924.00 <br /> Client Project:2018-0363 <br /> Location: 12011 19th Ave SE Everett,WA 98208 <br /> Dear Mr. Lindhal, <br /> Enclosed please find test results for the 42 sample(s) submitted to our laboratory for analysis on <br /> 5/10/2018. <br /> Examination of these samples was conducted for the presence of identifiable asbestos fibers using <br /> polarized light microscopy (PLM) with dispersion staining in accordance with both EPA 600/M4-82-020, <br /> Interim Method for the Determination of Asbestos in Bulk Insulation Samples and EPA 600/R-93/116 <br /> Method for the Determination of Asbestos in Bulk Building Materials. <br /> For samples containing more than one separable layer of materials, the report will include findings for <br /> each layer (labeled Layer 1 and Layer 2, etc. for each individual layer). The asbestos concentration in <br /> the sample is determined by calibrated visual estimation. <br /> For those samples with asbestos concentrations between 1 and 10 percent based on visual estimation, <br /> the EPA recommends a procedure known as point counting (NESHAPS, 40 CFR Part 61). Point <br /> counting is a statistically more accurate means of quantification for samples with low concentrations of <br /> asbestos. <br /> The detection limit for the calibrated visual estimation is <1%, 400 point counts is 0.25% and 1000 point <br /> counts is 0.1% <br /> Samples are archived for two weeks following analysis. Samples that are not retrieved by the client are <br /> discarded after two weeks. <br /> Thank you for using our laboratory services. Please do not hesitate to call if there is anything further we <br /> can assist you with. <br /> Sincerely, <br /> — <br /> Nick Ly, Technical Director <br /> KWRILV <br /> 1.888.NVL.LABS Enc.: Sample Results NVL Laboratories,Inc. <br /> ;t)P .`y!.'.'i Lab Code:102063-0 4708 Aurora Ave N, Seattle,WA 98103 <br /> www.nvllabs.com p 206.547.0100 I f 206.634.1936 <br /> page 1 of 21 <br />